package com.hjk.common.utils.security;

import org.junit.Test;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Random;

/**
 * 目的是在使用Nginx过程中,当做BASIC验证时,
 * 需要使用到Apache的密码格式文件,而且必须是采用函数 crypt(3) 加密的格式,
 * 发现在linux中使用htpasswd命令式可以生成Nginx要求的采用函数 crypt(3) 加密的格式密码文件,
 * 但是在windows下使用htpasswd命令就生成不了,
 * 于是参照PostgreSQL JDBC中提供的org.postgresql.util.UnixCrypt类编写了一个纯java方式生成Apache的
 * htpasswd格式的密码文件的一个小工具供网友任意使用.
 * 标签： htpasswd Apache
 */
public class CryptUtils {
    //
    // Null constructor - can't instantiate class

    public CryptUtils() {
    }

    private static final char[] saltChars =
            ("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789./".toCharArray());
    private static final int ITERATIONS = 16;
    private static final int con_salt[] = {
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
            0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01,
            0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08, 0x09,
            0x0A, 0x0B, 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A,
            0x0B, 0x0C, 0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12,
            0x13, 0x14, 0x15, 0x16, 0x17, 0x18, 0x19, 0x1A,
            0x1B, 0x1C, 0x1D, 0x1E, 0x1F, 0x20, 0x21, 0x22,
            0x23, 0x24, 0x25, 0x20, 0x21, 0x22, 0x23, 0x24,
            0x25, 0x26, 0x27, 0x28, 0x29, 0x2A, 0x2B, 0x2C,
            0x2D, 0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34,
            0x35, 0x36, 0x37, 0x38, 0x39, 0x3A, 0x3B, 0x3C,
            0x3D, 0x3E, 0x3F, 0x00, 0x00, 0x00, 0x00, 0x00,};
    private static final boolean shifts2[] = {
            false, false, true, true, true, true, true, true,
            false, true, true, true, true, true, true, false
    };
    private static final int skb[][] = {
            {
                    /** for C bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
                    0x00000000, 0x00000010, 0x20000000, 0x20000010,
                    0x00010000, 0x00010010, 0x20010000, 0x20010010,
                    0x00000800, 0x00000810, 0x20000800, 0x20000810,
                    0x00010800, 0x00010810, 0x20010800, 0x20010810,
                    0x00000020, 0x00000030, 0x20000020, 0x20000030,
                    0x00010020, 0x00010030, 0x20010020, 0x20010030,
                    0x00000820, 0x00000830, 0x20000820, 0x20000830,
                    0x00010820, 0x00010830, 0x20010820, 0x20010830,
                    0x00080000, 0x00080010, 0x20080000, 0x20080010,
                    0x00090000, 0x00090010, 0x20090000, 0x20090010,
                    0x00080800, 0x00080810, 0x20080800, 0x20080810,
                    0x00090800, 0x00090810, 0x20090800, 0x20090810,
                    0x00080020, 0x00080030, 0x20080020, 0x20080030,
                    0x00090020, 0x00090030, 0x20090020, 0x20090030,
                    0x00080820, 0x00080830, 0x20080820, 0x20080830,
                    0x00090820, 0x00090830, 0x20090820, 0x20090830,},
            {
                    /** for C bits (numbered as per FIPS 46) 7 8 10 11 12 13 */
                    0x00000000, 0x02000000, 0x00002000, 0x02002000,
                    0x00200000, 0x02200000, 0x00202000, 0x02202000,
                    0x00000004, 0x02000004, 0x00002004, 0x02002004,
                    0x00200004, 0x02200004, 0x00202004, 0x02202004,
                    0x00000400, 0x02000400, 0x00002400, 0x02002400,
                    0x00200400, 0x02200400, 0x00202400, 0x02202400,
                    0x00000404, 0x02000404, 0x00002404, 0x02002404,
                    0x00200404, 0x02200404, 0x00202404, 0x02202404,
                    0x10000000, 0x12000000, 0x10002000, 0x12002000,
                    0x10200000, 0x12200000, 0x10202000, 0x12202000,
                    0x10000004, 0x12000004, 0x10002004, 0x12002004,
                    0x10200004, 0x12200004, 0x10202004, 0x12202004,
                    0x10000400, 0x12000400, 0x10002400, 0x12002400,
                    0x10200400, 0x12200400, 0x10202400, 0x12202400,
                    0x10000404, 0x12000404, 0x10002404, 0x12002404,
                    0x10200404, 0x12200404, 0x10202404, 0x12202404,},
            {
                    /** for C bits (numbered as per FIPS 46) 14 15 16 17 19 20 */
                    0x00000000, 0x00000001, 0x00040000, 0x00040001,
                    0x01000000, 0x01000001, 0x01040000, 0x01040001,
                    0x00000002, 0x00000003, 0x00040002, 0x00040003,
                    0x01000002, 0x01000003, 0x01040002, 0x01040003,
                    0x00000200, 0x00000201, 0x00040200, 0x00040201,
                    0x01000200, 0x01000201, 0x01040200, 0x01040201,
                    0x00000202, 0x00000203, 0x00040202, 0x00040203,
                    0x01000202, 0x01000203, 0x01040202, 0x01040203,
                    0x08000000, 0x08000001, 0x08040000, 0x08040001,
                    0x09000000, 0x09000001, 0x09040000, 0x09040001,
                    0x08000002, 0x08000003, 0x08040002, 0x08040003,
                    0x09000002, 0x09000003, 0x09040002, 0x09040003,
                    0x08000200, 0x08000201, 0x08040200, 0x08040201,
                    0x09000200, 0x09000201, 0x09040200, 0x09040201,
                    0x08000202, 0x08000203, 0x08040202, 0x08040203,
                    0x09000202, 0x09000203, 0x09040202, 0x09040203,},
            {
                    /** for C bits (numbered as per FIPS 46) 21 23 24 26 27 28 */
                    0x00000000, 0x00100000, 0x00000100, 0x00100100,
                    0x00000008, 0x00100008, 0x00000108, 0x00100108,
                    0x00001000, 0x00101000, 0x00001100, 0x00101100,
                    0x00001008, 0x00101008, 0x00001108, 0x00101108,
                    0x04000000, 0x04100000, 0x04000100, 0x04100100,
                    0x04000008, 0x04100008, 0x04000108, 0x04100108,
                    0x04001000, 0x04101000, 0x04001100, 0x04101100,
                    0x04001008, 0x04101008, 0x04001108, 0x04101108,
                    0x00020000, 0x00120000, 0x00020100, 0x00120100,
                    0x00020008, 0x00120008, 0x00020108, 0x00120108,
                    0x00021000, 0x00121000, 0x00021100, 0x00121100,
                    0x00021008, 0x00121008, 0x00021108, 0x00121108,
                    0x04020000, 0x04120000, 0x04020100, 0x04120100,
                    0x04020008, 0x04120008, 0x04020108, 0x04120108,
                    0x04021000, 0x04121000, 0x04021100, 0x04121100,
                    0x04021008, 0x04121008, 0x04021108, 0x04121108,},
            {
                    /** for D bits (numbered as per FIPS 46) 1 2 3 4 5 6 */
                    0x00000000, 0x10000000, 0x00010000, 0x10010000,
                    0x00000004, 0x10000004, 0x00010004, 0x10010004,
                    0x20000000, 0x30000000, 0x20010000, 0x30010000,
                    0x20000004, 0x30000004, 0x20010004, 0x30010004,
                    0x00100000, 0x10100000, 0x00110000, 0x10110000,
                    0x00100004, 0x10100004, 0x00110004, 0x10110004,
                    0x20100000, 0x30100000, 0x20110000, 0x30110000,
                    0x20100004, 0x30100004, 0x20110004, 0x30110004,
                    0x00001000, 0x10001000, 0x00011000, 0x10011000,
                    0x00001004, 0x10001004, 0x00011004, 0x10011004,
                    0x20001000, 0x30001000, 0x20011000, 0x30011000,
                    0x20001004, 0x30001004, 0x20011004, 0x30011004,
                    0x00101000, 0x10101000, 0x00111000, 0x10111000,
                    0x00101004, 0x10101004, 0x00111004, 0x10111004,
                    0x20101000, 0x30101000, 0x20111000, 0x30111000,
                    0x20101004, 0x30101004, 0x20111004, 0x30111004,},
            {
                    /** for D bits (numbered as per FIPS 46) 8 9 11 12 13 14 */
                    0x00000000, 0x08000000, 0x00000008, 0x08000008,
                    0x00000400, 0x08000400, 0x00000408, 0x08000408,
                    0x00020000, 0x08020000, 0x00020008, 0x08020008,
                    0x00020400, 0x08020400, 0x00020408, 0x08020408,
                    0x00000001, 0x08000001, 0x00000009, 0x08000009,
                    0x00000401, 0x08000401, 0x00000409, 0x08000409,
                    0x00020001, 0x08020001, 0x00020009, 0x08020009,
                    0x00020401, 0x08020401, 0x00020409, 0x08020409,
                    0x02000000, 0x0A000000, 0x02000008, 0x0A000008,
                    0x02000400, 0x0A000400, 0x02000408, 0x0A000408,
                    0x02020000, 0x0A020000, 0x02020008, 0x0A020008,
                    0x02020400, 0x0A020400, 0x02020408, 0x0A020408,
                    0x02000001, 0x0A000001, 0x02000009, 0x0A000009,
                    0x02000401, 0x0A000401, 0x02000409, 0x0A000409,
                    0x02020001, 0x0A020001, 0x02020009, 0x0A020009,
                    0x02020401, 0x0A020401, 0x02020409, 0x0A020409,},
            {
                    /** for D bits (numbered as per FIPS 46) 16 17 18 19 20 21 */
                    0x00000000, 0x00000100, 0x00080000, 0x00080100,
                    0x01000000, 0x01000100, 0x01080000, 0x01080100,
                    0x00000010, 0x00000110, 0x00080010, 0x00080110,
                    0x01000010, 0x01000110, 0x01080010, 0x01080110,
                    0x00200000, 0x00200100, 0x00280000, 0x00280100,
                    0x01200000, 0x01200100, 0x01280000, 0x01280100,
                    0x00200010, 0x00200110, 0x00280010, 0x00280110,
                    0x01200010, 0x01200110, 0x01280010, 0x01280110,
                    0x00000200, 0x00000300, 0x00080200, 0x00080300,
                    0x01000200, 0x01000300, 0x01080200, 0x01080300,
                    0x00000210, 0x00000310, 0x00080210, 0x00080310,
                    0x01000210, 0x01000310, 0x01080210, 0x01080310,
                    0x00200200, 0x00200300, 0x00280200, 0x00280300,
                    0x01200200, 0x01200300, 0x01280200, 0x01280300,
                    0x00200210, 0x00200310, 0x00280210, 0x00280310,
                    0x01200210, 0x01200310, 0x01280210, 0x01280310,},
            {
                    /** for D bits (numbered as per FIPS 46) 22 23 24 25 27 28 */
                    0x00000000, 0x04000000, 0x00040000, 0x04040000,
                    0x00000002, 0x04000002, 0x00040002, 0x04040002,
                    0x00002000, 0x04002000, 0x00042000, 0x04042000,
                    0x00002002, 0x04002002, 0x00042002, 0x04042002,
                    0x00000020, 0x04000020, 0x00040020, 0x04040020,
                    0x00000022, 0x04000022, 0x00040022, 0x04040022,
                    0x00002020, 0x04002020, 0x00042020, 0x04042020,
                    0x00002022, 0x04002022, 0x00042022, 0x04042022,
                    0x00000800, 0x04000800, 0x00040800, 0x04040800,
                    0x00000802, 0x04000802, 0x00040802, 0x04040802,
                    0x00002800, 0x04002800, 0x00042800, 0x04042800,
                    0x00002802, 0x04002802, 0x00042802, 0x04042802,
                    0x00000820, 0x04000820, 0x00040820, 0x04040820,
                    0x00000822, 0x04000822, 0x00040822, 0x04040822,
                    0x00002820, 0x04002820, 0x00042820, 0x04042820,
                    0x00002822, 0x04002822, 0x00042822, 0x04042822,},};
    private static final int SPtrans[][] = {
            {
                    /** nibble 0 */
                    0x00820200, 0x00020000, 0x80800000, 0x80820200,
                    0x00800000, 0x80020200, 0x80020000, 0x80800000,
                    0x80020200, 0x00820200, 0x00820000, 0x80000200,
                    0x80800200, 0x00800000, 0x00000000, 0x80020000,
                    0x00020000, 0x80000000, 0x00800200, 0x00020200,
                    0x80820200, 0x00820000, 0x80000200, 0x00800200,
                    0x80000000, 0x00000200, 0x00020200, 0x80820000,
                    0x00000200, 0x80800200, 0x80820000, 0x00000000,
                    0x00000000, 0x80820200, 0x00800200, 0x80020000,
                    0x00820200, 0x00020000, 0x80000200, 0x00800200,
                    0x80820000, 0x00000200, 0x00020200, 0x80800000,
                    0x80020200, 0x80000000, 0x80800000, 0x00820000,
                    0x80820200, 0x00020200, 0x00820000, 0x80800200,
                    0x00800000, 0x80000200, 0x80020000, 0x00000000,
                    0x00020000, 0x00800000, 0x80800200, 0x00820200,
                    0x80000000, 0x80820000, 0x00000200, 0x80020200,},
            {
                    /** nibble 1 */
                    0x10042004, 0x00000000, 0x00042000, 0x10040000,
                    0x10000004, 0x00002004, 0x10002000, 0x00042000,
                    0x00002000, 0x10040004, 0x00000004, 0x10002000,
                    0x00040004, 0x10042000, 0x10040000, 0x00000004,
                    0x00040000, 0x10002004, 0x10040004, 0x00002000,
                    0x00042004, 0x10000000, 0x00000000, 0x00040004,
                    0x10002004, 0x00042004, 0x10042000, 0x10000004,
                    0x10000000, 0x00040000, 0x00002004, 0x10042004,
                    0x00040004, 0x10042000, 0x10002000, 0x00042004,
                    0x10042004, 0x00040004, 0x10000004, 0x00000000,
                    0x10000000, 0x00002004, 0x00040000, 0x10040004,
                    0x00002000, 0x10000000, 0x00042004, 0x10002004,
                    0x10042000, 0x00002000, 0x00000000, 0x10000004,
                    0x00000004, 0x10042004, 0x00042000, 0x10040000,
                    0x10040004, 0x00040000, 0x00002004, 0x10002000,
                    0x10002004, 0x00000004, 0x10040000, 0x00042000,},
            {
                    /** nibble 2 */
                    0x41000000, 0x01010040, 0x00000040, 0x41000040,
                    0x40010000, 0x01000000, 0x41000040, 0x00010040,
                    0x01000040, 0x00010000, 0x01010000, 0x40000000,
                    0x41010040, 0x40000040, 0x40000000, 0x41010000,
                    0x00000000, 0x40010000, 0x01010040, 0x00000040,
                    0x40000040, 0x41010040, 0x00010000, 0x41000000,
                    0x41010000, 0x01000040, 0x40010040, 0x01010000,
                    0x00010040, 0x00000000, 0x01000000, 0x40010040,
                    0x01010040, 0x00000040, 0x40000000, 0x00010000,
                    0x40000040, 0x40010000, 0x01010000, 0x41000040,
                    0x00000000, 0x01010040, 0x00010040, 0x41010000,
                    0x40010000, 0x01000000, 0x41010040, 0x40000000,
                    0x40010040, 0x41000000, 0x01000000, 0x41010040,
                    0x00010000, 0x01000040, 0x41000040, 0x00010040,
                    0x01000040, 0x00000000, 0x41010000, 0x40000040,
                    0x41000000, 0x40010040, 0x00000040, 0x01010000,},
            {
                    /** nibble 3 */
                    0x00100402, 0x04000400, 0x00000002, 0x04100402,
                    0x00000000, 0x04100000, 0x04000402, 0x00100002,
                    0x04100400, 0x04000002, 0x04000000, 0x00000402,
                    0x04000002, 0x00100402, 0x00100000, 0x04000000,
                    0x04100002, 0x00100400, 0x00000400, 0x00000002,
                    0x00100400, 0x04000402, 0x04100000, 0x00000400,
                    0x00000402, 0x00000000, 0x00100002, 0x04100400,
                    0x04000400, 0x04100002, 0x04100402, 0x00100000,
                    0x04100002, 0x00000402, 0x00100000, 0x04000002,
                    0x00100400, 0x04000400, 0x00000002, 0x04100000,
                    0x04000402, 0x00000000, 0x00000400, 0x00100002,
                    0x00000000, 0x04100002, 0x04100400, 0x00000400,
                    0x04000000, 0x04100402, 0x00100402, 0x00100000,
                    0x04100402, 0x00000002, 0x04000400, 0x00100402,
                    0x00100002, 0x00100400, 0x04100000, 0x04000402,
                    0x00000402, 0x04000000, 0x04000002, 0x04100400,},
            {
                    /** nibble 4 */
                    0x02000000, 0x00004000, 0x00000100, 0x02004108,
                    0x02004008, 0x02000100, 0x00004108, 0x02004000,
                    0x00004000, 0x00000008, 0x02000008, 0x00004100,
                    0x02000108, 0x02004008, 0x02004100, 0x00000000,
                    0x00004100, 0x02000000, 0x00004008, 0x00000108,
                    0x02000100, 0x00004108, 0x00000000, 0x02000008,
                    0x00000008, 0x02000108, 0x02004108, 0x00004008,
                    0x02004000, 0x00000100, 0x00000108, 0x02004100,
                    0x02004100, 0x02000108, 0x00004008, 0x02004000,
                    0x00004000, 0x00000008, 0x02000008, 0x02000100,
                    0x02000000, 0x00004100, 0x02004108, 0x00000000,
                    0x00004108, 0x02000000, 0x00000100, 0x00004008,
                    0x02000108, 0x00000100, 0x00000000, 0x02004108,
                    0x02004008, 0x02004100, 0x00000108, 0x00004000,
                    0x00004100, 0x02004008, 0x02000100, 0x00000108,
                    0x00000008, 0x00004108, 0x02004000, 0x02000008,},
            {
                    /** nibble 5 */
                    0x20000010, 0x00080010, 0x00000000, 0x20080800,
                    0x00080010, 0x00000800, 0x20000810, 0x00080000,
                    0x00000810, 0x20080810, 0x00080800, 0x20000000,
                    0x20000800, 0x20000010, 0x20080000, 0x00080810,
                    0x00080000, 0x20000810, 0x20080010, 0x00000000,
                    0x00000800, 0x00000010, 0x20080800, 0x20080010,
                    0x20080810, 0x20080000, 0x20000000, 0x00000810,
                    0x00000010, 0x00080800, 0x00080810, 0x20000800,
                    0x00000810, 0x20000000, 0x20000800, 0x00080810,
                    0x20080800, 0x00080010, 0x00000000, 0x20000800,
                    0x20000000, 0x00000800, 0x20080010, 0x00080000,
                    0x00080010, 0x20080810, 0x00080800, 0x00000010,
                    0x20080810, 0x00080800, 0x00080000, 0x20000810,
                    0x20000010, 0x20080000, 0x00080810, 0x00000000,
                    0x00000800, 0x20000010, 0x20000810, 0x20080800,
                    0x20080000, 0x00000810, 0x00000010, 0x20080010,},
            {
                    /** nibble 6 */
                    0x00001000, 0x00000080, 0x00400080, 0x00400001,
                    0x00401081, 0x00001001, 0x00001080, 0x00000000,
                    0x00400000, 0x00400081, 0x00000081, 0x00401000,
                    0x00000001, 0x00401080, 0x00401000, 0x00000081,
                    0x00400081, 0x00001000, 0x00001001, 0x00401081,
                    0x00000000, 0x00400080, 0x00400001, 0x00001080,
                    0x00401001, 0x00001081, 0x00401080, 0x00000001,
                    0x00001081, 0x00401001, 0x00000080, 0x00400000,
                    0x00001081, 0x00401000, 0x00401001, 0x00000081,
                    0x00001000, 0x00000080, 0x00400000, 0x00401001,
                    0x00400081, 0x00001081, 0x00001080, 0x00000000,
                    0x00000080, 0x00400001, 0x00000001, 0x00400080,
                    0x00000000, 0x00400081, 0x00400080, 0x00001080,
                    0x00000081, 0x00001000, 0x00401081, 0x00400000,
                    0x00401080, 0x00000001, 0x00001001, 0x00401081,
                    0x00400001, 0x00401080, 0x00401000, 0x00001001,},
            {
                    /** nibble 7 */
                    0x08200020, 0x08208000, 0x00008020, 0x00000000,
                    0x08008000, 0x00200020, 0x08200000, 0x08208020,
                    0x00000020, 0x08000000, 0x00208000, 0x00008020,
                    0x00208020, 0x08008020, 0x08000020, 0x08200000,
                    0x00008000, 0x00208020, 0x00200020, 0x08008000,
                    0x08208020, 0x08000020, 0x00000000, 0x00208000,
                    0x08000000, 0x00200000, 0x08008020, 0x08200020,
                    0x00200000, 0x00008000, 0x08208000, 0x00000020,
                    0x00200000, 0x00008000, 0x08000020, 0x08208020,
                    0x00008020, 0x08000000, 0x00000000, 0x00208000,
                    0x08200020, 0x08008020, 0x08008000, 0x00200020,
                    0x08208000, 0x00000020, 0x00200020, 0x08008000,
                    0x08208020, 0x00200000, 0x08200000, 0x08000020,
                    0x00208000, 0x00008020, 0x08008020, 0x08200000,
                    0x00000020, 0x08208000, 0x00208020, 0x00000000,
                    0x08000000, 0x08200020, 0x00008000, 0x00208020
            }
    };
    private static final byte cov_2byte[] = {
            0x2E, 0x2F, 0x30, 0x31, 0x32, 0x33, 0x34, 0x35,
            0x36, 0x37, 0x38, 0x39, 0x41, 0x42, 0x43, 0x44,
            0x45, 0x46, 0x47, 0x48, 0x49, 0x4A, 0x4B, 0x4C,
            0x4D, 0x4E, 0x4F, 0x50, 0x51, 0x52, 0x53, 0x54,
            0x55, 0x56, 0x57, 0x58, 0x59, 0x5A, 0x61, 0x62,
            0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6A,
            0x6B, 0x6C, 0x6D, 0x6E, 0x6F, 0x70, 0x71, 0x72,
            0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7A
    };

    private static final int byteToUnsigned(byte b) {
        int value = (int) b;

        return (value >= 0 ? value : value + 256);
    }

    private static int fourBytesToInt(byte b[], int offset) {
        int value;

        value = byteToUnsigned(b[offset++]);
        value |= (byteToUnsigned(b[offset++]) << 8);
        value |= (byteToUnsigned(b[offset++]) << 16);
        value |= (byteToUnsigned(b[offset++]) << 24);

        return (value);
    }

    private static final void intToFourBytes(int iValue, byte b[], int offset) {
        b[offset++] = (byte) ((iValue) & 0xff);
        b[offset++] = (byte) ((iValue >>> 8) & 0xff);
        b[offset++] = (byte) ((iValue >>> 16) & 0xff);
        b[offset++] = (byte) ((iValue >>> 24) & 0xff);
    }

    private static final void PERM_OP(int a, int b, int n, int m, int results[]) {
        int t;

        t = ((a >>> n) ^ b) & m;
        a ^= t << n;
        b ^= t;

        results[0] = a;
        results[1] = b;
    }

    private static final int HPERM_OP(int a, int n, int m) {
        int t;

        t = ((a << (16 - n)) ^ a) & m;
        a = a ^ t ^ (t >>> (16 - n));

        return (a);
    }

    private static int[] des_set_key(byte key[]) {
        int schedule[] = new int[ITERATIONS * 2];

        int c = fourBytesToInt(key, 0);
        int d = fourBytesToInt(key, 4);

        int results[] = new int[2];

        PERM_OP(d, c, 4, 0x0f0f0f0f, results);
        d = results[0];
        c = results[1];

        c = HPERM_OP(c, -2, 0xcccc0000);
        d = HPERM_OP(d, -2, 0xcccc0000);

        PERM_OP(d, c, 1, 0x55555555, results);
        d = results[0];
        c = results[1];

        PERM_OP(c, d, 8, 0x00ff00ff, results);
        c = results[0];
        d = results[1];

        PERM_OP(d, c, 1, 0x55555555, results);
        d = results[0];
        c = results[1];

        d = (((d & 0x000000ff) << 16) | (d & 0x0000ff00)
                | ((d & 0x00ff0000) >>> 16) | ((c & 0xf0000000) >>> 4));
        c &= 0x0fffffff;

        int s, t;
        int j = 0;

        for (int i = 0; i < ITERATIONS; i++) {
            if (shifts2[i]) {
                c = (c >>> 2) | (c << 26);
                d = (d >>> 2) | (d << 26);
            } else {
                c = (c >>> 1) | (c << 27);
                d = (d >>> 1) | (d << 27);
            }

            c &= 0x0fffffff;
            d &= 0x0fffffff;

            s = skb[0][(c) & 0x3f]
                    | skb[1][((c >>> 6) & 0x03) | ((c >>> 7) & 0x3c)]
                    | skb[2][((c >>> 13) & 0x0f) | ((c >>> 14) & 0x30)]
                    | skb[3][((c >>> 20) & 0x01) | ((c >>> 21) & 0x06)
                    | ((c >>> 22) & 0x38)];

            t = skb[4][(d) & 0x3f]
                    | skb[5][((d >>> 7) & 0x03) | ((d >>> 8) & 0x3c)]
                    | skb[6][(d >>> 15) & 0x3f]
                    | skb[7][((d >>> 21) & 0x0f) | ((d >>> 22) & 0x30)];

            schedule[j++] = ((t << 16) | (s & 0x0000ffff)) & 0xffffffff;
            s = ((s >>> 16) | (t & 0xffff0000));

            s = (s << 4) | (s >>> 28);
            schedule[j++] = s & 0xffffffff;
        }
        return (schedule);
    }

    private static final int D_ENCRYPT(
            int L, int R, int S, int E0, int E1, int s[]) {
        int t, u, v;

        v = R ^ (R >>> 16);
        u = v & E0;
        v = v & E1;
        u = (u ^ (u << 16)) ^ R ^ s[S];
        t = (v ^ (v << 16)) ^ R ^ s[S + 1];
        t = (t >>> 4) | (t << 28);

        L ^= SPtrans[1][(t) & 0x3f]
                | SPtrans[3][(t >>> 8) & 0x3f]
                | SPtrans[5][(t >>> 16) & 0x3f]
                | SPtrans[7][(t >>> 24) & 0x3f]
                | SPtrans[0][(u) & 0x3f]
                | SPtrans[2][(u >>> 8) & 0x3f]
                | SPtrans[4][(u >>> 16) & 0x3f]
                | SPtrans[6][(u >>> 24) & 0x3f];

        return (L);
    }

    private static final int[] body(int schedule[], int Eswap0, int Eswap1) {
        int left = 0;
        int right = 0;
        int t = 0;

        for (int j = 0; j < 25; j++) {
            for (int i = 0; i < ITERATIONS * 2; i += 4) {
                left = D_ENCRYPT(left, right, i, Eswap0, Eswap1, schedule);
                right = D_ENCRYPT(right, left, i + 2, Eswap0, Eswap1, schedule);
            }
            t = left;
            left = right;
            right = t;
        }

        t = right;

        right = (left >>> 1) | (left << 31);
        left = (t >>> 1) | (t << 31);

        left &= 0xffffffff;
        right &= 0xffffffff;

        int results[] = new int[2];

        PERM_OP(right, left, 1, 0x55555555, results);
        right = results[0];
        left = results[1];

        PERM_OP(left, right, 8, 0x00ff00ff, results);
        left = results[0];
        right = results[1];

        PERM_OP(right, left, 2, 0x33333333, results);
        right = results[0];
        left = results[1];

        PERM_OP(left, right, 16, 0x0000ffff, results);
        left = results[0];
        right = results[1];

        PERM_OP(right, left, 4, 0x0f0f0f0f, results);
        right = results[0];
        left = results[1];

        int out[] = new int[2];

        out[0] = left;
        out[1] = right;

        return (out);
    }

    /**
     * <P>Encrypt a password given the cleartext password and a "salt".</P>
     *
     * @param salt     A two-character string representing the salt used to
     *                 iterate the encryption engine in lots of different ways. If you
     *                 are generating a new encryption then this value should be
     *                 randomised.
     * @param original The password to be encrypted.
     * @return A string consisting of the 2-character salt followed by the
     * encrypted password.
     */
    public static final byte[] crypt(byte salt[], byte original[]) {
        byte result[] = new byte[13];

        byte byteZero = salt[0];
        byte byteOne = salt[1];

        result[0] = byteZero;
        result[1] = byteOne;

        int Eswap0 = con_salt[byteZero];
        int Eswap1 = con_salt[byteOne] << 4;

        byte key[] = new byte[8];

        for (int i = 0; i < key.length; i++) {
            key[i] = (byte) 0;
        }

        for (int i = 0; i < key.length && i < original.length; i++) {
            int iChar = (int) original[i];

            key[i] = (byte) (iChar << 1);
        }

        int schedule[] = des_set_key(key);
        int out[] = body(schedule, Eswap0, Eswap1);

        byte b[] = new byte[9];

        intToFourBytes(out[0], b, 0);
        intToFourBytes(out[1], b, 4);
        b[8] = 0;

        for (int i = 2, y = 0, u = 0x80; i < 13; i++) {
            for (int j = 0, c = 0; j < 6; j++) {
                c <<= 1;

                if (((int) b[y] & u) != 0) {
                    c |= 1;
                }

                u >>>= 1;

                if (u == 0) {
                    y++;
                    u = 0x80;
                }
                result[i] = cov_2byte[c];
            }
        }
        return result;
    }

  private  static String encoding = "ISO8859-1";
    private static Random random = new Random();

    public static String crypt( String password) {
        try {

            byte[] original = password.getBytes(encoding);
            byte[] salt = getSalt().toString().getBytes(encoding);
            byte[] result = new byte[13];

            byte byteZero = salt[0];
            byte byteOne = salt[1];

            result[0] = byteZero;
            result[1] = byteOne;

            int Eswap0 = con_salt[byteZero];
            int Eswap1 = con_salt[byteOne] << 4;

            byte[] key = new byte[8];

            for (int i = 0; i < key.length && i < original.length; i++) {
                int iChar = (int) original[i];

                key[i] = (byte) (iChar << 1);
            }

            int[] schedule = des_set_key(key);
            int[] out = body(schedule, Eswap0, Eswap1);

            byte[] b = new byte[9];

            intToFourBytes(out[0], b, 0);
            intToFourBytes(out[1], b, 4);
            b[8] = 0;

            for (int i = 2, y = 0, u = 0x80; i < 13; i++) {
                for (int j = 0, c = 0; j < 6; j++) {
                    c <<= 1;

                    if (((int) b[y] & u) != 0) {
                        c |= 1;
                    }

                    u >>>= 1;

                    if (u == 0) {
                        y++;
                        u = 0x80;
                    }
                    result[i] = cov_2byte[c];
                }
            }
            return new String(result);

        } catch (Exception e) {
            e.printStackTrace();

        }
        return null;
    }

    private static StringBuilder getSalt() {
        StringBuilder salt = new StringBuilder();
        salt.append(saltChars[random.nextInt(saltChars.length - 1)]);
        salt.append(saltChars[random.nextInt(saltChars.length - 1)]);
        return salt;
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {

        StringBuilder salt = getSalt();

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        System.out.println("###################################");
        System.out.println("## Apache password file Generater ##");
        System.out.println("###################################");

        System.out.print("##Enter the username:");
        String username = br.readLine();

        System.out.print("##Enter the password:");

        String password = br.readLine();

        byte[] pwd = CryptUtils.crypt(salt.toString().getBytes(encoding), password.getBytes(encoding));
        System.out.println("##Generated apache htpasswd is:\r\n" + username + ":" + new String(pwd));
        System.out.print("##Please press Enter key to exit!");
        br.readLine();
    }

    /**
     *生成
     */
    @Test
    public void trestCrypt() {
      System.out.println(CryptUtils.crypt( "hjk"));

    }

}
